Nutrient Interactions and Deficiency Diagnosis in the Lettuce V. Potassium Content and Response to Potassium

1958 ◽  
Vol 11 (4) ◽  
pp. 471 ◽  
Author(s):  
AE Grant Lipp ◽  
DW Goodall
Keyword(s):  
Dry Matter ◽  
Analytical Data ◽  
Potassium Content ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Matter Production ◽  
Subsequent Response ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and receiving nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for these elements. An attempt was made to relate these analytical data to the subsequent response (in dry matter production) shown by the plants when a further amount of potassium was supplied.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce III. Nitrogen Content and Response to Nitrogen

1957 ◽  
Vol 10 (3) ◽  
pp. 253 ◽  
Author(s):  
WG Slater ◽  
DW Goodall
Keyword(s):  
Dry Matter ◽  
Nitrate Nitrogen ◽  
Analytical Data ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Matter Production ◽  
Subsequent Response ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and receiving nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for total, soluble, and nitrate nitrogen. An attempt was made to relate these analytical data to the subsequent response (in dry matter production) shown by the plants when a further amount of nitrogen was supplied.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce IV. Phosphorus Content and Response to Phosphorus

1958 ◽  
Vol 11 (1) ◽  
pp. 30 ◽  
Author(s):  
AE Grant Lipp ◽  
DW Goodall
Keyword(s):  
Growth Response ◽  
Phosphorus Content ◽  
Analytical Data ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and recelvmg nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for these elements. An attempt was made to relate these analytical data to the growth response following a supplementary application of phosphorus.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce II. Effects of Nutrition on Water Content

1957 ◽  
Vol 10 (1) ◽  
pp. 57 ◽  
Author(s):  
DW Goodall ◽  
WG Slater ◽  
AE Grant Lipp
Keyword(s):  
Water Content ◽  
Dry Matter ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Culture Experiment ◽  
Potassium Supply ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

In a sand� culture experiment with lettuces, the water content (as per cent. of dry matter) of the aerial portions was studied in plants subjected to five levels of nitrogen, phosphorus, and potassium supply in all combinations.

Relationships between production, nutrient accumulation, and chlorophyll synthesis in an Eleocharis quadrangulata population

1971 ◽  
Vol 49 (6) ◽  
pp. 883-888 ◽  
Author(s):  
Claude E. Boyd ◽  
David H. Vickers
Keyword(s):  
Standing Crop ◽  
Dry Matter ◽  
Aquatic Macrophytes ◽  
Chlorophyll Synthesis ◽  
Early Spring ◽  
Chemical Substances ◽  
Net Productivity ◽  
Matter Production ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Maximum standing crop in an Eleocharis quadrangulata population was estimated at 881 g dry wt./m2. Net daily productivity was highest during May when about 50% of the total standing crop was produced. Net productivity for the entire period of vegetative increase, April 1 to August 4, was 7.0 g/m2 per day. The accumulation of several nutrients, especially nitrogen, phosphorus, and potassium was proportionately more rapid than dry matter production during early spring growth. Net chlorophyll synthesis was also greater during early spring. Patterns of change in dry matter and chemical substances in the E. quadrangulata population were similar to those in populations of other emergent aquatic macrophytes.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce

1955 ◽  
Vol 8 (3) ◽  
pp. 301 ◽  
Author(s):  
DW Goodall ◽  
AE Grant Lipp ◽  
WG Slater
Keyword(s):  
Plant Material ◽  
Dry Weight ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Development ◽  
Culture Experiment ◽  
Foliage Plants ◽  
Phosphorus And Potassium ◽  
The Relationship ◽  
Nitrogen Phosphorus

A sand-culture experiment with lettuces is described, having as its principal purpose the study of the relationship between the potential responses of plants to applications of nitrogen, phosphorus, and potassium fertilizers and the composition of. their foliage. Plants were supplied initially with five levels of these nutrients in all combinations, samples of plant material were taken fot analysis at various stages of development, and at 44 days from sowing additional quantities of nutrients were supplied to some of the cultures in order that their response potentialities might be determined. The present paper analyses the effects of the nutrient interactions on plant dry weight, further results being left to subsequent papers.

scholarly journals EFFETS DE LA DENSITE DU PEUPLEMENT ET DE L’APPORT DES ELEMENTS N, P ET K SUR LA PRODUCTION D’ENSILAGE DE MAIS DE MATURITE DIFFERENTE

1977 ◽  
Vol 57 (3) ◽  
pp. 735-743
Author(s):  
JEAN GENEST ◽  
JEAN-LOUIS DIONNE
Keyword(s):  
Dry Matter ◽  
Plant Density ◽  
Corn Silage ◽  
Matter Production ◽  
Plant Densities ◽  
Silage Production ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
K Fertilization ◽  
Corn Hybrid

The experiment was designed to measure the effect of corn maturity, plant density, nitrogen, phosphorus and potassium fertilization on corn silage production. Funk’s G 4252 corn hybrid planted 10 cm apart in rows 75 cm apart produced an average of 18,325 kg/ha of dry matter over 4 yr, when fertilized with 200 kg/ha of N. Nitrogen fertilization, plant density, and choice of hybrid were the most important factors in dry matter production. Yield increases of 30% were associated with a 3% decrease in quality. Optimum yields were predicted for plant densities of 133,000 pl/ha with 180 kg/ha of N. There was no significant response to P and K fertilization. Yearly applications of P at 50 kg/ha allowed an increase in available P in the soil. Even with yearly applications of K at 200 kg/ha, a constant decrease in soil exchangeable K content was observed.

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