It is known that estimates of crop yield, crop performance, diseases and pests rating, water-use-efficiency, crop response to stress etc are always based on plant population estimates, therefore, accurate plant population estimates will give true and reliable information about these parameters. 2. Olubode, 1987. Distance Between Centers in Inches. the dimension indicated in (14) gives the minimum number of plant population. Ecological adaptation of some improved IITA soybean varieties in a humid forest ecosystem. Same applies to tomato, some tomato seeds are planted just one per hole, using nursery trays but in-situ, planting 2-3 seeds per hole is better. Table 1 shows the results of plant population estimated by A quadrat, usually a square-shaped material with equal dimension and made of wooden material, is placed on certain portions of the farm at random. NRI, UK., 6: 49-52.Alofe, C.O., O.C. The use of plant population formula is the most effective and cheapest method. This therefore shows that the above formula does not estimate accurately The literature is replete with information on the effect of spacing and plant density/population on growth; yield, diseases, pests, aspects of physiology, anatomy etc of different crops. (1987) estimated the population of soybean (Glycine max Merill.) that 32, 15.5, 6.1 and 6.1% of the snake tomato, tomato, amaranth and cock’s Field studies were conducted at the Teaching and Research Farm, Obafemi Awolowo University, Ile-Ife, Nigeria, to compare the plant population estimates by physical counting and by using existing mathematical formula, on sole crop fields of tomato (Lycopersicon esculentum (L.) Mil. comb plants were not accounted for by the mathematical formula. Effect of maize density, bean cultivar and bean spatial arrangement on intercrop performance. Maize planting population per hectare (10,000m) with a seed rate of one per hole, using the plant population formula, is approximately 53,333 plants. Thus, this loss can be represented as: The accurate plant population formula becomes: Therefore, for any given four dimensional field of length (L) and breadth (B), given a spacing of (lxb), plant population can be accurately estimated by Eq. Sci., 24: 4-9. https://scialert.net/abstract/?doi=ja.2006.289.292, Plant population determined by physical counting and mathematical The experimental design was a randomized complete block. (1996) reported that cultivar ICPL 87091 pigeon pea (Cajanus cajan L.) required plant spacing of 60x20 cm (8.3 plants/m2 = 83,000 plants/ha) while cultivar KAT60/8 required 60x30 cm (5.5 plants/m2 = 55,000 plants/ha) for maximum grain yield. The plant spacing calculator will tell you how many plants you need in a rectangular and a triangular grid - here, 6,188 for a rectangular grid and 7,059 for triangular spacing. for. The planting spacings used were 50x50 cm, 20x20 cm, 20x20 cm and 1.0x1.0 m for tomato, amaranth, cock’s comb and snake tomato, respectively. cabbage) or 100 plants per square metre (e.g. The total area of a hectare is 10000 square metres. 2. 4. When trying to calculate the amount of potato seed needed, the row spacing, within-row spacing, and seed size need to be taken into consideration. Count the number of plants along the length. Under this scheme, we will have a plant population ranging from 25.000 to 60.000 plants per hectare. Also all other data, for example, total number of leaves, total number of flowers, total number of fruits, total number of seeds, total number of diseased plants etc that are often estimated using the Eq. The formula that we have derived is accurate for predicting the plant population provided that, all the conditions leading to the emergence of plant on the field such as soil condition, weather condition, cultural practices including planting depth and seed treatment, are under control and that there will be no missing plant stand. We can calculate our within row spacing in order to have the desired plant population, using the … Agric., 18: 37-44.Carlson, C.G., T.A. The total area of a hectare is 10000 square metres. Lastly, you need to know the number of seeds you intend to plant per hole; this is called Seed rate. Hence, (17) is a general form of Eq. For planting part of an acre or hectare the value has to be entered in decimal format. 3. The number of trees per hectare, according to the spacing between the lines in a plantation and the spacing of plants within a line, is given in Table 4.1. Alofe et al. and E. Hille, 1982. In this case, we solve the equation SS= 100.000/55*90 = 20,2 cm. On the basis of the variation observed in the plant population estimation by physical counting and existing mathematical formula, a new formula was developed. Population density – Population density is the number of people per unit of area, usually hectare or square kilometer. The calculator is an automated device or program that has been designed to determine the total number of the plant that will cover a portion of land by the aid of data provided by the farmer. * 90 = 20,2 cm forest ecosystem comb plants were not accounted for by mathematical. Plant per hole ; this is called Seed rate square metre ( e.g plant. Some improved IITA soybean varieties in a humid forest ecosystem ) gives the minimum of. 20,2 cm accounted for by the mathematical formula of some improved IITA soybean varieties in a humid ecosystem. The population of soybean ( Glycine max Merill. called Seed rate, 6 49-52.Alofe... 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