Synopsis Maximum length × maximum width × 0.747 was found to be an accurate and reliable method of estimating leaf area in 6 grain sorghum varieties. Using the component of variance technique, it was shown that most of the variability in area from leaf to leaf on the sorghum plants within a set of data was due to position on the plant.

Synopsis Twenty‐inch rows exceeded 40‐inch rows in yield by 6% under irrigation and by 5% without irrigation. This yield superiority was associated mainly with more 2‐eared and fewer barren plants.

Synopsis A curvilinear relationship between grain yield and leaf area was found. Generally, changes in each of the 3 yield components were responsible for yield differences, although number of seeds per head and seed weight underwent greatest change. Greater yield reduction resulted from removing leaf area from upper than from lower portions of the plant. Likewise, removing alternate leaves was more deleterious than removing half of each leaf. In 1959, mean yield decreases of 23, 35, 43, and 95%, respectively, were obtained from removing approximately 33, 50, 67, and 100% of the leaf area at late boot and anthesis stages.

Synopsis Corn performance was unsatisfactory in 20‐inch uncultivated rows. Grain and forage sorghums performed favorably in narrow rows. In grain sorghum, evaporative power of the air, soil temperature, light intensity, and evaporation from the soil surface decreased with decreasing row width.

Synopsis Madrid sweetclover excelled in dry matter and nitrogen production in the fall of the seeding year. Southern, nonhardy alfalfas were superior to the hardy strain, Ranger. Higher yields were obtained from medium red clover than from. Ladino white clover, but both were inferior to other legumes. Madrid sweetclover grown alone outyielded the various legume associations. Madrid was the major component of all associations in which it was included. Red clover and Ladino white clover lacked strong competitive ability under these conditions.