Crop Yield Estimation (Biological yield and economic yield)
Definition of Biological yield and economic yield
The total dry matter produced by a crop is known as biological yield and a fraction of the biological yield which is useful for human is known as economic yield.
Yield Estimation of Field Crops
Yield estimation of various crops have been attempt with the use of yield components. Yield cost of Rice crop are as follows
01. RICE
What would be the yield of rice grains, if the average panicle density/m2 260, No. of field grains/panicle 136, Test weight 20g. Estimate the yield of rice?
Solution
Yield of rice (ton/ha) =(10,000 X No. of panicle/m2 X No. of grains/panicle X Test weight) ÷ (1000 X 1000 X 100 X 10).
= (10,000 X 260 X 136 X 20) ÷ (1000 X 1000 X 100 X 10).
= 7.072 ton/ha.
02. WHEAT
Yield Estimation of wheat grain and straw from following information
· Spacing 20cm X 3cm.
· No. of effective tills/plant.
· No. of grains/panicle 32.
· Test weight 40 g.
· Grain: straw 1:1.5
Solution
Spacing= 20 X 3 cm2 =0.2 X 0.03 m2= 0.006 m2
0.006 m2 place have 1 till
= 1 m2 place have (1 ÷ 0.006) till = 500 tills.
Yield of wheat grain= (10,000 X No. Effective tills/m2 X No. of grains/panicle X test weight) ÷ (1000 X 1000 X 100 X 10).
= (10,000 X 500 X 32 X 40) ÷ (1000 X 1000 X 100 X 10).
= 6.4 ton/ha.
Yield of wheat straw= (6.4 X 1.5) = 9.6 ton/ha. [Given that grain: straw= 1:1.5].
03. MAIZE
Yield Estimation of maize from following information
· Spacing 75cm X 30cm = 0.75 X 0.3 m2 =0.225 m2.
· No. of cobs-2.
· No. of grains row/cob-10.
· No. of seeds/grain row- 25.
· Test weight 200 g.
Solution
Yield of maize= (10,000 X cobs/plant X grains row/cob X No. of seeds/grain row X test weight) ÷ (1000 X 1000 X 100 X 10 X spacing/m2).
= (10,000 X 2 X 10 X 25 X 200 g) ÷ (1000 X 1000 X 100 X 10 X 0.225).
= 4.44 ton/ha.
04. SUGARCANE
Yield Estimation of sugarcane from following information
· No. of millable cane/clump 15.
· Spacing of clump 90 X 60 cm2= 0.54 m2.
· Weight of cane 600 g.
Solution
Yield of Sugarcane= (10,000 X No. of millable cane/clump X Weight of cane) ÷ (spacing/m2 X 1000 X 100 X 10)
= (10,000 X 600 X 15) ÷ (0.54 m2. X 1000 X 100 X 10).
= 166.66 ton/ha.
05. JUTE FIBRE
Yield Estimation of Jute fibre from following information
· Spacing of clump 25 X 10 cm2= 0.025 m2.
· Weight of matured plant 65 g.
· Extractable fibre/percent 7.5%.
Solution
Yield of Jute fibre= (10,000 X Weight of matured plant X Extractable fibre/percent) ÷ (spacing X 1000 X 100 X 10).
= (10,000 X 7.5 X 65) ÷ (0.025 X 1000 X 100 X 100).
= 19.5 Quintal/ha.
Useful Agricultural Websites