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Table (35) – (36) – (37) – (38)

XVI. Balance sheet of nitrogen, phosphorus and potassium as influenced by different treatments under hybrid rice-mustard cropping sequence

Data on balance sheet of available nitrogen, phosphorus and potassium as influenced by interaction of different treatment combinations under hybrid rice-mustard cropping sequence are presented in Table 35 and depicted in Fig. 30. The data on balance of nutrients in soil in hybrid rice-mustard cropping sequence indicated that T₆M₂ recorded the highest gain of nitrogen in soil to the extent of 157.38 kg ha^-1, followed by T₇M₂ (145.59 kg ha^-1). The improvement of nitrogen status in soil was to the extent of 128.54 kg ha^-1 due to T₃M₂ followed by T₂M₂ (113.96 kg ha^-1) and T₆M₃ (87.36 kg ha^-1). Negative nitrogen status was observed in case of T₁M₂ (-71.98 kg ha^-1) and T₁M₃ (-141.08 kg ha^-1) while the highest nitrogen loss in soil was noted in T₁M₁ (-161.16 kg ha^-1).

Table 35. Balance sheet for available nitrogen, phosphorus and potassium (kg ha^-1) in hybrid rice-mustard cropping sequence as influenced by different treatment combinations (average of two years).

It was further observed that the maximum gain of phosphorus in soil was due to T₇M₂ (28.95 kg ha^-1) followed by T₇M₃ (25.73 kg ha^-1) in hybrid rice-mustard cropping sequence. Similarly, T₆M₂ resulted in gain of phosphorus in soil to the extent of 23.28 kg ha^-1 followed by T₇M₁ (22.69 kg ha^-1). Negative gain of phosphorus in soil in hybrid rice-mustard cropping sequence was observed due to absolute control T₈M₁ (-7.19 kg ha^-1), T₁M₂ (-8.53 kg ha^-1) and T₁M₃ (-11.73 kg ha^-1) while highest phosphorus loss was shown by T₁M₁ (-15.50 kg ha^-1). The maximum increase in potassium status in soil to the extent of 106.46 kg ha^-1 was recorded by T₇M₂ followed by T₇M₃ (105.95 kg ha^-1), T₇M₁ (103.97 kg ha^-1), T₆M₂ (59.20 kg ha^-1), T₆M₃ (58.94 kg ha^-1), T₃M₂ (57.62 kg ha^-1) and T₃M₃ (56.72 kg ha^-1) while no fertilization (T₁M₁) to hybrid rice-mustard sequence resulted in to the net negative balance of 20.56 kg ha^-1.

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XVII. Economics of hybrid rice-mustard cropping sequence

Data pertaining to economics of the hybrid rice-mustard cropping sequence as influenced by different treatment combinations are presented in Table 36 and depicted in Fig. 31. It was evident from the data that the highest net return was obtained due to T₇M₂ (Rs. 38982.56) closely followed by T₇M₃ (Rs. 38519.64) and T₃M₂ (Rs. 38320.01). T₆M₂ recorded the net returns of Rs. 38200.13 followed by T₆M₃ (Rs. 37623.71) and T₃M₃ (Rs. 37500.19). The lowest net return was recorded by T₁M₁ (Rs. 1748.51). The highest benefit cost ratio of 1.93 was found in T₃M₂ and T₃M₃ followed by 1.92 in T₆M₁ and T₇M₃, 1.91 in T₃M₁, T₇M₁ and T₇M₂.

Table 36. Economics of hybrid rice-mustard cropping sequence as influenced by different treatment combinations (average of two years).

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XVIII. Production potential (q ha^-1) of hybrid rice-mustard cropping sequence

The production potential (q ha^-1) of hybrid rice-mustard cropping sequence as influenced by different treatment combinations is presented in Table 37 and depicted in Fig. 32. It was noticed that highest production potential was recorded due to T₆M₂ (83.60 q ha^-1). It was closely followed by T₇M₂ (83.48 q ha^-1) and T₆M₃ (83.10 q ha^-1). Similarly, T₇M₃ recorded 83.02 q ha^-1 followed by T₆M₁ (81.86 q ha^-1), T₇M₁ (81.37 q ha^-1) and T₃M₂ (81.24 q ha^-1). The lowest production potential was seen in T₁M₁ (40.68 q ha^-1).

Table 37. Production potential (q ha^-1) of hybrid rice-mustard cropping sequence as influenced by different treatment combinations (average of two years).

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XIX. Hybrid rice yield equivalent (q ha^-1) of hybrid rice-mustard cropping sequence

The hybrid rice yield equivalent (q ha^-1) of hybrid rice-mustard cropping sequence as influenced by different treatment combinations is presented in Table 38 and depicted in Fig. 33. It was noticed that highest hybrid rice yield equivalent was recorded due to T₇M₂ (196.90 q ha^-1). It was closely followed by T₆M₂ (195.91 q ha^-1) and T₇M₃ (194.99 q ha^-1). Similarly, T₆M₃ recorded 193.83 q ha^-1 followed by T₃M₂ (191.34 q ha^-1), T₃M₃ (188.84 q ha^-1) and T₆M₁ (188.66 q ha^-1). The lowest hybrid rice yield equivalent was seen in T₁M₁ (91.72 q ha^-1).

Table 38. Hybrid rice yield equivalent (q ha^-1) of hybrid rice-mustard cropping sequence as influenced by different treatment combinations (average of two years).

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